1812653812 has 12 divisors (see below), whose sum is σ = 3196359936. Its totient is φ = 899408120.

The previous prime is 1812653803. The next prime is 1812653819. The reversal of 1812653812 is 2183562181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812653819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1729108 + ... + 1730155.

It is an arithmetic number, because the mean of its divisors is an integer number (266363328).

Almost surely, 2^1812653812 is an apocalyptic number.

It is an amenable number.

1812653812 is a deficient number, since it is larger than the sum of its proper divisors (1383706124).

1812653812 is a wasteful number, since it uses less digits than its factorization.

1812653812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3459398 (or 3459396 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 1812653812 is about 42575.2723068215. The cubic root of 1812653812 is about 1219.2842285325.

The spelling of 1812653812 in words is "one billion, eight hundred twelve million, six hundred fifty-three thousand, eight hundred twelve".